C843 If You Compare a Man to a Man He will Kill You with Anger

"What problem?" Lin Feng frowned and asked.

"How did you notice the problem when Faang Lee was refining the pill?" Lu Yuqing was puzzled. Faang Lee wasn't the only one who couldn't figure it out. He couldn't figure out how Liu Tie found the problem, not to mention that he wasn't even a grade-1 apothecary